Scarifying attachment for paving rollers



May 19, 1931. w LASTER 1,805,524

SCARIFYING ATTACHMENT FOR PAVING ROLLERS Filed Feb, 7, 1950 s Sheets-Sheet 1 k 1 w v? N I [wanton yld 50:04am F May 19, 1931. w LASTER 1,805,524

SCARIFYING ATTACHMENT FOR PAVING ROLLERS Filed Feb. 7, 1930 3 Sheets-Sheet 2 May 19, 1931. LASTER 1,805,524

SCARIFYING ATTACHMENT FOR PAVING ROLLERS Filed Feb. 7, 1930 3 Sheets-Sheet 3 Patented Ma 1931'v a p 7 I 1,805,524

NHED PAT NT} I HARRY w. LASTER, onioax PARK, rtnnioisfassienon'or manages E m i scHINnr-nn, "on ELMHuR-srr, ILLINOISJ soARmYI nG moment .ron' Mme emes f' Application'filed February 7,1930; sexier-no. 42"e,459.; 7 i

This invention relatesto scarifying'attachextending side frame members 10; Rotatably ment for paving rollers, and itsprincipal ob= mounted in bearing blocks" secured on said ject is to provide improved mechanism proside frame members 10 is{ a, shaft 11-. upon pelled'by a powerful machine; such as astreet which; are rigidly mounted two spikedrollers 5 paving roller, for tearing/up the surface 12; .said'spikedmollers12 arepositively a portion of macadamized streets or roads. driven fromthe'tractionrollfi bygearing, Another object is to provide a scari-fying athere shown as comprising. a sprocketwheel tachm-ent with rotating means forzloosening '18 connected ,to-said traction roll-f7,. and-a the surface portion of the pavement, com-. sprocket wheel-l l mounteduponarcountem o bined with other means for tearing the surshaft 15journaled' in-bearing 'blockscarriedr face portionof the pavement away from the bytheside framemembers 10; i A sprocket part therebelow. t i f chain "16 jis trained around said sprocket I Itfurther consists in a scarifying attach- Wheels 13 and -14anda'nothe'r sprocket chain ment, as above set forthfrrwhich the searif-y- 17 istrained around sprocketwheels-18- and v :5 ing implements are forced" down upon the l9, one of whichi'srigidly mounted upon'the. 65 pavement by a ram or other engine operated w n era 1 n theQ r::up' nth sliaft ibysteam or other expansiblefluid.

1L 7 m I r With these and other objects andjadvan- The spikesofthespiked;roller-.-12-are-shown tages inview, thisinventionconsists in the M 20. aIidIO P i' e sturdy spike members, V 20 several novel features hereinafter fully-set ri'gidly' secured on the, face of; the roller. 70 i forth and claimed. i o Preferably the sprocket :whe'el l9' is: placed Theinvention'is clearly illustrated in the at the middle of theshaft 11 andf the two drawingsaccompanying:this speci-fication in spikedirollerslZ are'iplaced at-i the sides of hich- I q 7 v I the sprocket wheel. With this arrangement, 7 Figure 1 is a side elevation ofa -conven -p r is app i i h 'mi l th ffij tional street paving lroller, partlybroken Shaft andt'ransmitted toithei rollers; atiei'ther broken away, equipped witha scarifying at- .eild-thereoifi o .1 E V tachment embodying a simple form ofgthe The-gear ratio of said gearingis such that present invention; he lineal feetofitravel of=the-spiked rollers 31,- Fig: 2 is a plan of the paving roller, partlyl2 is-somewhat' greater thanth'atof, the tr-ao- 89 broken away, and thescarifyingattachrnent; tlOIlIIOlLY. The purpose of-this increased 7 a Fig. 3 is an enlarged detail vertical longip e fv h pi roller above tudinal section of the sc'arifyingattachment that ofthetr-action roll 'is-to enabl the spiked taken on the line 3-1-3 of Fig. 2; and rollerito assist the traction roll in propelling Fig; 4 is a perspective view of fragments hem i il e 6 3.51110 a ups 85 of the tooth supportingmember; a toothand portion of thepaVement'; V p p H locking bar. j Mounted upon-thereanend'of the-support- R'eferringito said drawings, the reference ing bars 01" side framemembers 1O ia -he characters designates a street paving roller scarifier 21f Theoscarifier --isadjustably 40 of conventional form having the usualsteermounted on the side frame members as no ing roll '6 and traction roll '7. -iUsually a to. regulate" the depth of ,cut nadebyits steam boiler 8 is provided forxsupplying teeth; 1 j The teeth 22 time .scar'ifier are in steam to the engine 9 which drives'the roller. the form of square bars pointed at'both ends- Street paving rollers are-common andwell and said-teeth are adjustable lengthwise in known, and itis believed that no further def their support for! purposes ofadjustment, as 95 scription of the one shown is required so far' Will appear later. t Y r I r as this specification is concerned. i supporting head '23 formed of a solid Fulcrumed ona line co-axial with the axis block of material is rotatably mountedi'ion of the traction-roll 7 is the scarifying strucashaft 24%secured in the freeends: of thersidei V turewhich comprises, in part, longitudinally frame members l0as-bynutsior the a-like; n10

The ends of the head 23 are formed with ears 25 through which the shaft 24 extends, and projectin up from said ears are lugs 26 through w ich extend adjustment studs 27 that bear against shoulder blocks 28 bolted or otherwise fastened to the upper edges of the side frame members 10. By turning the adjustmentstuds 27, the head 23 may be partially rotated upon the axis of the shaft 24, thereby changing the angular position of the teeth 22, and, as a consequence, increasing or' decreasing the depth at which they will engage the pavement.

The head 23 is formed with a plurality of square openings 29 therethrough which extend at an oblique angle, and in said openings are received the teeth 22. In order to provide for the longitudinal adjustment of the teeth 22 in the head23, the teeth are formed with spaced notches 30 in their side edges and the head 23 is formed with a lengthwise extending groove 31 in its upper face with which any of the notches in the teeth maybe made to register, and a locking bar 32 is provided which is placed in the groove 81 and in the notches of the teeth that have been adjusted into registry with the groove.

When the bar is placed in the groove and registering notches, it effectively locks the teeth to thehead and provides a very sturdy and rugged connection therebetween which is very essential because of the rough usage to which a machine of this character is put. For securing the locking bar in place, a plurality of studs 33 may be provided in the head 23 in position to extend through openings in the locking bar, and nuts 34 are provided upon the studs for engaging with the locking bar. a

It is to be observed that the head 23 may be adjusted to bring the teeth 22 into any desired angle of inclination and the teeth may thus be raised or lowered somewhat to bring their effective ends into position for making the desired cut. Furthermore, in case it is desired to make a deeper or shallower cut than can be obtained by adjusting the head, the locking bar 32 may be detached and the teeth 22 drawn out of the openings 29 and turned to bring the proper notches into register with the groove 31, so as to obtain the proper adjustment after which the locking bar 32 may be again secured in place, thereby securely locking the teeth in the head.

Power operated means is provided for depressing the supporting element for the spiked rollers and scarifier, and, as shown, said device comprises a ram 35 mounted upon some stationary portion of the paving roller and having a piston rod 35 connected to the supporting element for the spiked rollers and scarifier. As shown, the connection between the piston rod and supporting element comprises a rod or bar 36 mounted in brackets 37 secured to the side frame members. The piston rod is provided with a sleeved member on its lower end which encircles the rod or bar 36.

When used in connection with a steam paving roller, the ram 35 may be supplied with steam from the boiler of the paving roller and suitable control mechanism (not shown) may. of course, be provided for governing the admission of the steam to the cylinder of the ram. Inasmuch as the supporting element for the s iked roller and scarifier is movable upon a fulcrum, the ram is also fulcrumed upon the paving roller to permit it to oscillate thereon and thereby accommodate itself to any changes of angularity between the supporting element and cylinder of the ram.

The ram operates to depress the scarifier structure and means are provided for limiting the downward movement of the latter.

Said means comprises, as shown, a pair of heavy chains 38 secured to the brackets 37 and to some stationary part of the paving roller. Turn buckles, or other threaded connections, are provided in connection with the chains, whereby the position of the scarifying structure may be regulated to obtain the desired penetration of the spikes 20 into the pavement. It is to be observed that the ram 35 operates to force the scaritying structure in a downward direction, which action is limited by the length of the chains. As a result, the amount of penetration of the spikes into thesurface portionof the pavement can be regulated to suit the peculiar conditions of the pavements.

In the operation of the apparatus. the proper adjustments are made with the chains 38 and turnbuckles 40 and with the scarifying head 23 and its teeth 22. The paving roller is driven over the pavement to be operated on and steam is admitted to the ram, thereby forcing the scarifying structure down to the limit allowed by the chains. Inasmuch as the spiked rollers 12 travel at a greater surface speed than the traction roll of the paving roller, the spiked rollers not only act to tear up the surface portion of the pavement, but also aid the traction roll in propelling the machine along the pavement. The teeth of the scarifier follow the spiked rollers and rip off the surface portion of the pavement to a depth determined by the lower ends of the teeth.

It is to be observed that the paving roller may be used for rolling down pavements in the usual manner, and when so used, the scarifying attachment is raised above the surface of the pavement so that it will not interfere with the operation of the paving roller. I

The ram operated scarifying supporting element may be used for other purposes than for supporting the spiked rollers and scarifier. For instance, a grooved paving roller, such as is shown and described in my application" for patent on paving rollers, iiled March 13, 1929, under Serial No. 346,537, may be used in place of the spiked rollers when rolling pavements.-

chine to be used for scarifying pavements and for rolling them.

I claimas new, and desire Letters Patent:

1. A scarifying attachment for paving rollers comprising a supporting element arranged for attachment to a paving roller, a spiked roller and a scarifier mounted onsaid supporting element, power operated means for rotating said spiked roller, and a. ram

connected to said supporting element and:

supporting element.

3. A scarifying attachment for paving rollers comprising a supporting element arranged for attachment to a pavlng roller, a spiked roller and a scarifier mounted onsaid supporting element, power operated driving means for rotating saidsplked ro1ler,a ram supported by said paving roller and connected to said supporting element and operating to depress the same and therewith the spiked roller and scarifier, and lengthwise adjustable chain connections between said paving roller and supporting element for' limiting the downward movement of the latter.

4. The combination with a paving roller, I

lel openings extending transversely therehaving a traction roll, a supporting element fulcrumed on. the axis of said roll, a spiked roller and a scarifier mounted on said supporting element, gearing between said trac- V tion roll and the spiked roller, and a power element interposed between the paving roller and supporting element for depressing the latter and therewith the spiked roller and scarifier.

5. The combination with a paving roller having a traction roll, a supporting element,

fulcrumed on the axis of the tractioni roll, a spiked roller and a scariiier mounted on said supporting element, chain drive gearing between said traction roll and the spiked roller, a ram mounted upon the paving roller, and operatively connected with said supporting element, and adjustable connections vbetween I The change be made very quickly, thus enabling the ma-V to secure b-yh said paving roller and the supporting element forlimiting the downward movement of said supporting element.

6.. A" scarifving attachment for paving I rollers comprising a supporting element hav- HigdlWO -s1de' frame members arranged for attachmentto' a paving roller, 'a shaft rotat- "ably mounted in sald'side frame members, a sprocket wheel mounted 1n the middle of idly secured to said shaft, and aram interposed between the paving roller and the supporting element and operating to depress said supporting element and therewith the spiked rollers. V a I 7. In a scarifying attachment for paving rollers, the combination of a pair of supporting bars, arranged for attachment to a paving'roller, a crosswise extending rodsecured in one end of said bars, a tooth supporting head extendingbetween said supporting bars and having ears on its ends through which said rod extends, teeth mounted in said head, and adjustment studs carried by said ears and arrangedto engageshouldered memberscarried by, the supporting bars.

8. In a sc'arifying attachment for paving rollers, thecombination of a pair of supporting bars, arranged for attachment to a paving roller, a crosswise extending-rod secured in one end ofs aid bars, a tooth supporting head extending between said supporting bars and having ears on its ends through which said rod extends, teeth mounted in said head for longitudinal adjustment therein, and adjustmentstuds carried by said ears and ar ranged, to engage shouldered members carried by the supporting bars.

I 9. In a scarifying attachment for paving rollers, thecombination of a pair of supporting bars, a tooth supporting head mounted thereon, saidxhead being formed with paralthrough and agroove in one face intersecting said openings, teeth extending through said openings, said teeth being formed with spaced 7 notches in theirqsides, any of which is arranged to bebroughtintoregister withsaid groovefa locking bar adapted to be let into said groove and the notches registering therewith, and means for securing said locking bar in place; I a e a 10. Inascarifying attachment for paving rollers, the combination of a pair of supporting. bars, a tooth supporting head mounted thereon, said head being formed with parallel square openings extending transversely therethroughand a groove in one face intersecting said openings, teeth in the form of square bars extending through said square openings, said teeth being formed with spaced notches in their sides, any of which is arranged to be brought into register with said groove, a locking bar adapted to be let into said groove and the notches registering therewith, and means for securing said lockng bar in place.

HARRY W. LASTER. 

